PHMSA MEGA RULE TEST–- ELIGIBLE PROJECT – COMPRESSOR STATION 184 TO COMPRESSOR STATION 154 - PIPELINE MAINTENANCE – UPDATE 2

The Cleaning tool start date has changed, as noted below.  See previous Notice ID 46944 dated May 11, 2026.

In accordance with its FERC Gas Tariff and as posted on Natural's Outage Impact Report (X25- 1094390), Natural will be performing an ILI project on the OE#1 Line between CS 184, located in Beckham County, Oklahoma (Segment 6 of Natural's Midcontinent Zone) and CS 154, located in Gray County, Texas (Segment 6 of Natural's Midcontinent Zone).  Natural is required to shut in certain locations during this restriction, as set forth below. This ILI project is being performed pursuant to the PHMSA Mega Rule and, as set forth in its Tariff, is an Eligible Project (ID 4613) included on the Eligible Project List posted on Natural's internet website.  See Eligible Project ID, line name and location identified below (Exhibit F- Docket No. RP22-1222 Settlement, as updated on January 6, 2026 on Natural's interactive website).  This outage is subject to the provisions of Section 5.2 (c) (5) of the General Terms and Conditions of Natural's FERC Gas Tariff.

Project ID        Line Name                                               Location/Segment No.                                 

4613                 OKLAHOMA EXTENSION #1             CS 184 SAYRE TO CS 154

As such, effective for gas days indicated below, the following locations will be unavailable for deliveries or receipts until the work has been completed.

LOCATIONS UNAVAILABLE:

LOC 47097         MARKWEST/NGPL BUFFALO CREEK PROCESS

Additionally, based on pipeline conditions and during the tool run dates as noted below, Natural will schedule Segment 2 for eastbound and westbound flow through Compressor Station 156 (CS 156), located in Kiowa County, Oklahoma to Primary Firm and Secondary in-path Firm transports only.  AOR/ITS and Secondary out-of-path Firm transports will not be available for eastbound or westbound flow through CS 156 until the work has been completed.

TOOL RUN DATES:

Gas day Wednesday, May 27, 2026 and continuing through gas day Thursday, May 28, 2026 (Cleaning Tool)

Gas day Tuesday June 2, 2026 and continuing through gas day Thursday, June 4, 2026 (Caliper, MFL, and EMAT Tool)

Continue to monitor Natural's interactive website for any updates during this restriction.  Please contact your Account Director or Scheduling Representative if you have any questions.